Shaving system

ABSTRACT

A shaving unit includes a composite that has a surface for engaging the user&#39;s skin. The composite includes adjacent lengthwise-extending portions, each containing a shaving aid.

This application is a continuation of Ser. No. 08/807,492 filed Feb. 27,1997.

This invention relates to shaving systems.

In shaving systems of the wet shave type, factors such as the frictionaldrag of the razor across the skin, the force needed to sever hairs, andirritation of preexisting skin damage can create a degree of shavingdiscomfort. Discomfort and other problems accompanying wet shavingsystems can be alleviated by the application of shaving aids to theskin. Shaving aids may be applied prior to, during, or after shaving.

A number of problems accompany the use of pre- and post-applied shavingaids. Pre-applied shaving aids can evaporate or can be carried away fromthe site of application by repeated strokes of the razor. Post-appliedshaving aids are not present on the skin during shaving and thus theirapplication may be too late to prevent an unwanted effect. Moreover, theapplication of both pre-applied and post-applied shaving aids addadditional steps to the shaving process.

It is known to incorporate a shaving aid into a razor by mounting acomposite including the shaving aid to the razor. For example, Rogers etal., U.S. Pat. No. 5,113,585 describes a composite including awater-insoluble matrix material, a water-soluble shaving aid, and a lowmolecular weight release enhancing agent. When exposed to water duringshaving, the water-soluble shaving aid leaches from the composition ontothe skin. The release enhancing agent also dissolves in the water andimproves the release of the water-soluble shaving aid from thecomposite.

SUMMARY OF THE INVENTION

The invention features a wet shaving system. The system includes a blademember including one or more blades and an external skin-engagingportion in proximity to the blade member. The shaving system may be, forexample, a disposable shaving cartridge adapted for coupling to oruncoupling from a razor handle, or a shaving head which is integral witha razor handle so that the complete razor is discarded as a unit whenthe blade or blades become dulled. The blade edge cooperates with theskin engaging portion to define shaving geometry.

Significantly, the skin-engaging portion includes a polymeric shavingaid composite including two adjacent exposed lengthwise-extendingportions, each containing a shaving aid. The shaving aid included ineach portion may be the same or different. The composite can be, forexample, an extruded composite.

A shaving aid composite having adjacent, lengthwise-extending portionsprovides a number of potential design advantages. For example, oneportion may contain a larger quantity of water-insoluble resin than thesecond portion, while the second portion contains a larger quantity ofshaving aid than the first portion. The first portion, then, may providesupport to the second portion, which in turn may release a significantquantity of shaving aid during shaving without breaking down or causingthe shaving geometry to change significantly.

Furthermore, the arrangement provides a way to incorporate incompatibleshaving aids into the same shaving system. One shaving aid, for example,may chemically react with another, if they are mixed together. Likewise,a shaving aid, if included in too large a quantity in a composite thatalso includes another shaving aid, may unfavorably impact the wearcharacteristics of the composite or, for example, when the other shavingaid is a lubricous water-soluble polymer, to reduce the lubricityprovided by the composite. Similarly, one shaving aid may requireelevated processing temperatures during an extrusion procedure thatwould cause a second shaving aid to decompose. By including theseshaving aids in different portions of the composite, the composite canbe coextruded with different processing temperatures for each portion.

Moreover, the two portions can provide a desirable surface geometry forthe composite. For example, the portions may be rounded, which mayprovide an enhanced skin-engaging surface on the composite.Alternatively, the exposed surface of one portion may be raised slightlyrelative to the second portion, which may enhance the wearcharacteristics of the first portion.

The invention also features a shaving system that includes two adjacentexposed lengthwise extending portions, one of which contains a colorant.The second portion has a different color than the first portion; it may,for example, contain no colorant or a colorant different from thecolorant used in the first portion. The colorant in the first portion isreleased (e.g., by leaching or by wear) during shaving. When first used,the composite preferably has a striped appearance caused by the contrastbetween the two positions. One or both of the portions may also containa shaving aid.

Other features and advantages of the invention will be apparent from thedescription of the preferred embodiment thereof, and from the claims.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a razor unit in accordance with theinvention.

FIG. 2 is a perspective view of a shaving aid composite in accordancewith the invention.

FIG. 3 is a side view of the composite in FIG. 2.

FIG. 4 is a perspective view of a second shaving aid composite inaccordance with the invention.

FIG. 5 is a perspective view of a third shaving aid composite inaccordance with the invention.

DETAILED DESCRIPTION

The replaceable shaving cartridge 10 shown in FIG. 1 is of the typeshown in U.S. Ser. No. 08/630,437, filed Apr. 10, 1996, which isassigned to the same assignee as the present application and is herebyincorporated by reference. It includes housing 16, which carries threeblades 18, guard 20, and striped solid, polymeric shaving aid composite22, which is in the form of an elongated insert member. The shaving aidcomposite is locked in an opening in the rear of the cartridge andincludes a shaving aid that, during shaving is released by the compositeto improve shave attributes. While shown at the rear portion of thisparticular shaving cartridge, the shaving aid composite may be locatedat any skin engaging portion of the shaving unit and may be fabricatedin any size or shape deemed appropriate. For example, the composite canbe incorporated into the shaving units described in U.S. Pat. No.4,586,225, which is incorporated by reference herein.

Referring to FIGS. 2 and 3, shaving aid composite 14 includeslengthwise-extending portions 44, 46, and 48 (each in the shape of arounded lobe), each including a lengthwise-extending exposed surface.Composite 14 also includes connecting portion 49, which connectsportions 44 and 48 and also optionally serves to lock the composite intoa mating receiving portion of the cartridge. Portions 44 and 48 andconnecting portion 49 have the same compositions and, together, surroundall but the exposed face of portion 46. They can provide support forportion 46. Portions 44, 46, and 48 each may be, for example, between1.20 inches and 1.35 inches (more preferably between 1.25 inches and1.275 inches) in length, and between 0.07 inch and 0.11 inch (morepreferably between 0.085 inch and 0.095 inch) in width.

Portions 44, 46, and 48 each contains a water insoluble polymer,optionally in different amounts, and a shaving aid. They may contain thesame shaving aid, or different shaving aids. In one embodiment portions44 and 48 are identical, and contain the same shaving aid, while portion46 contains a different shaving aid, optionally in combination with thesame shaving aid contained in portions 44 and 48.

Each portion also may contain other conventional shaving and compositeingredients, such as low molecular weight water-soluble releaseenhancing agents such as polyethylene glycol (e.g., 1-10% by weight),water-swellable release enhancing agents such as cross-linkedpolyacrylics (e.g., 2-7% by weight), colorants, antioxidants andpreservatives. Water-soluble release enhancing agents are described inU.S. Pat. No. 5,113,585, which is hereby incorporated by reference.Water-swellable release-enhancing agents are described in U.S. Ser. No.08/121,153, filed Sep. 13, 1993, which is assigned to the same assigneeas the parent application and is hereby incorporated by reference.Portions that contain a colorant can be designed to release thecolorant, and change color, during shaving, preferably in response towear of the portion. A portion may contain, for example, between about0.1% and about 5.0% (preferably between about 0.5% and 3%) colorant byweight.

Suitable water-insoluble polymers which can be used includepolyethylene, polypropylene, polystyrene, butadiene-styrene copolymer(e.g. medium and high impact polystyrene), polyacetal,acrylonitrile-butadiene-styrene copolymer, ethylene vinyl acetatecopolymer and blends such as polypropylene/polystyrene blend.

Preferably, each portion includes about 5% to 50%, more preferably about15 to 40%, and most preferably about 20 to 35% by weight of thewater-insoluble polymer. The more preferred water-insoluble polymer ispolystyrene, preferably a general purpose polystyrene such as BASF 2824or a high impact polystyrene (i.e. polystyrene-butadiene), such as Mobil4324. The portion should contain a sufficient quantity ofwater-insoluble polymer to provide adequate mechanical strength, bothduring production and use.

A shaving aid is a substance that enhances shaving performance. It may,for example, improve shaving comfort (e.g., by lubricating the skin,improve shaving efficiency, condition the beard, or condition the skin.Examples of shaving aids include lubricous water-soluble polymer such aspolyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropylcellulose, polyvinyl imidazoline, and polyhydroxyethylmethacrylate;beard hair softeners; oils such as silicone oil and mineral oil;substances that enhance the healing or stop the bleeding of the skin;essential oils such as menthol, eugenol, eucalyptol, safrol, and methylsalicylate; rinsing aids; non-volatile cooling agents; inclusioncomplexes of skin-soothing agents with cyclodextrin; fragrances; vitaminE (including common forms of vitamin E such as vitamin E acetate);vitamin A and B-carotene; panthenol and aloe;antipruritic/counterirritant materials; antimicrobial/keratolyticmaterials; anti-inflammatory agents; and astringents.

Enough shaving aid should be included to provide the desired benefit. Aportion may contain, for example, about 20% to about 80%, morepreferably about 40% to about 75%, by weight of a lubricous watersoluble polymer. A portion also may include, for example, about 0.01% toabout 5.0%, more preferably about 0.05 to about 1.0%, vitamin E (orcommon forms of vitamin E) by weight.

The preferred lubricous water-soluble polymer is polyethylene oxide. Themore preferred polyethylene oxides generally are known as POLYOX(available from Union Carbide Corporation) or ALKOX (available fromMeisei Chemical Works, Kyoto, Japan). These polyethylene oxides willpreferably have molecular weights of about 100,000 to 6 million, mostpreferably about 300,000 to 5 million. The most preferred polyethyleneoxide comprises a blend of about 40 to 80% of polyethylene oxide havingan average molecular weight of about 5 million (e.g. POLYOX COAGULANT)and about 60 to 20% of polyethylene oxide having an average molecularweight of about 300,000 (e.g. POLYOX WSR-N-750). The polyethylene oxideblend may also advantageously contain up to about 10% by weight of a lowmolecular weight (i.e., MW<10,000) polyethylene glycol such as PEG-100.

The shaving aid composite may be fabricated by any appropriate method,including injection molding and extrusion, the latter being preferred.

A preferred shaving aid composite is provided below. Portions 44 and 48(and connecting portion 49) are the same in each example. One shavingaid composite includes a central blue portion (46), the other a centralgreen portion (46). The colorant in the central portion is releasedduring shaving, generally by the gradual wearing away of that portionduring use, thereby indicating through color change that the shaving aidoriginally contained in the central portion is no longer beingdelivered.

Because of the rounded lobe geometry of portions 44, 46, and 48,including the significant recesses at the junctions of portions 44 and46 and portions 46 and 48, the shaving aid composite may have moresurface area available to contact the skin than, for example, a shavingaid composite having a flat skin-engaging surface. This may provideincreased lubrication for the skin and may reduce the time it takes forportion 46 to wear away. The raised elevation of the exposed surface ofportion 46 relative to the exposed surface of portions 44 and 48 alsomay enhance the rate of wear of portion 46.

In the chart, the components used in the shaving aid composites areprovided in the first column on the left. The quantities of eachcomponent in portions 44 and 48 and connecting portion 49 are providedin the second column. The third and fourth columns provide ranges forthe quantities of components that are used in the shaving aid compositeincluding a central blue portion (46). The fifth and sixth columnsprovide ranges for the quantities of components that are used in theshaving aid composite including a central green portion (46).

Portion 46 Component Portions 44, Portion 46 (Blue) (Green) Description48, and 49 HI LO HI LO BASF 2824 (CPS) 33.54% 22.50% 32.50% 23.00%33.00% Polyox Coag.¹ 33.02% 32.86% 38.86% 32.86% 38.86% Polyox WSR N75021.99% 0.00% 21.99% 0.00% 21.99% N-750 w/Vit E² 0.00% 21.99% 0.00%21.99% Dow 4500 PEG 10.00% 10.00% 10.00% 10.00% 10.00% Coz Stripwte.³1.20% 0.00% 0.00% 0.00% 0.00% B215 Irganox⁴ 0.25% 0.25% 0.25% 0.25%0.25% t-green⁵ 0.00% 0.00% 3.50% 3.50% Blue 1811-C⁶ 1.00% 1.00% 0.00%0.00% 100.00% ¹High impact polystyrene (e.g., Mobil 4324) could also beused. ²Vitamin E liquid (from Hoffman-LaRoche) spray coated on powderedN750 (4% load). ³Polystyrene-based color concentrate containing TiO₂(white) (from Coz Corp.). ⁴Antioxidant (from Ciba Geigy).⁵Polystyrene-based color concentrate (T-Green) (from Coz Corp.).⁶Polystyrene-based color concentrate (GN-Blue) (from Coz Corp.).

A preferred shaving aid composite has the following composition:

Portions 44, 48, and 49 Component Weight % Mobil 4324 33.54% PolyoxCoag. 33.02% Polyox WSR N750 21.99% Dow 4500 PEG 10.00% Coz Stripwte.1.20% B215 Irganox 0.25% TOTAL 100.00% Portion 46 Component Weight %BASF 2824 CPS 24.00% Polyox Coag. 38.86% Polyox WSR N750 3.90% Dow 4500PEG 10.00% GN Blue 1.00% B215 Irganox 0.25% Polyox WSR N-750 21.99%w/Vit E (4%) TOTAL 100.00%

The shaving aid composites can be prepared by conventional coextrusionor molding methods known to those skilled in the art. For example, thecomponents of the composite may be supplied by two separatemelting/pumping (plastics extruders), each consisting of a heatedbarrel, a pumping screw, a motor drive for that screw and a controlsystem for the entire system. The materials of the composite are fed inpowder form into their respective extruders (e.g., single screw typemanufactured by Davis Standard). The extruders can operate at the sameor different speeds and the same or different temperatures. The barreltemperature for each extruder can be ramped in three zones from 325° F.to 375° F.; a fourth heater at the die/barrel connection can also be setto 375° F., and a fifth heater at the die can range from 375° F. to 400°F. Via rugged weldments the molten streams of the components are broughttogether to form the composite. Portion 46 can be precisely located on aportion (combination 44, 48, and 49) through accurately machinedpathways in the die head. Because they have different compositions, thetwo molten materials are brought together at the last possible momentbefore exiting the die. Both materials exit the die head in a size andshape approximating that of the final product. The final dimensions areachieved using a series of forming rollers as the extrudate is cooled.The composite is typically extruded at a rate of 50 feet per minute.

The combined molten materials are drawn from the die head into thesizing/cooling device at a constant speed such that its cross section isalways constant. Under a bath of cool dry air the molten material iscooled until no longer pliable. Once cooled, the composite can be cut tothe appropriate length and attached to a razor cartridge.

Other examples of shaving aid composites may include the samecomposition for portions 44, 48, and connecting portion 49, and acentral portion (46) that contains about 90% of the composition used forportions 44 and 48, plus the following:

Example A—1% blue pigment and 10% Aloe.

Example B—1% blue pigment and 10% Menthol.

Example C—10% Frescolat (a menthol analog).

Example D—10% Mineral Oil/Vit. E.

Example E—10% Silicone fluid 1401.

Example F—5% Vit. E and 5% Panthenol.

Example G—10% Triclosan DP300 (an antimicrobial).

In other examples, portions 44 and 48 have the composition describedabove. The central portion contained the following percentages of thecomposition used in portions 44 and 48 (% Comp.), plus additionalingredients, as follows:

Example H—95% Comp. and 5% Triclosan DP300.

Example I—93% Comp. and 6% Menthol and 1% Silicone copolymer.

Example J—94% Comp. and 6% Menthol.

Example K—85% Comp. and 10% polyethylene oxide (60:40 Polyox blendpreviously used in portion 44) and 5% Salsorb.

In another example, central portion 46 may be composed of 80% Polyox(60:40 Polyox blend previously used in portion 44) and 20% nylon 12.

In another example, central portion 46 may contain the followingingredients:

Example L—80% Polyox (60:40 Polyox blend previously used in portion 44)and 14% polystyrene and 3% PEG 100 and 3% PVA.

Example M—70% amorphous nylon (Zytel 330) and 30% Polyox (60/40).

Example N—77.75% Polyox (60:40 Polyox blend previously used in portion44) and 10% PEG 100 and 0.25% Irganox and 2% green pigment and 10% Vit.E.

Other embodiments are within the claims. For example, referring to FIG.4, a wedge-shaped shaving aid composite 56 includes lengthwise-extendingportions 58, 60, and 62, each including a lengthwise-extending exposedsurface. Shaving aid composite 56 also includes connection portion 64.Portions 58, 60, 62, and 64 can have, for example, the same compositionsas portions 44, 46, 48, and 49, respectively, and may be made byconventional co-extrusion or molding techniques. Shaving aid composite56 can be attached to a shaving cartridge, e.g., the shaving cartridgeused in Atra®, by gluing the composite to the recess in the cartridge.

Alternatively, referring to FIG. 5, the wedge-shaped shaving composite64 may include two lengthwise-extending portions 66 and 68. Portion 66can contain 90% Comp., 1% blue pigment, and 10% Menthol or Aloe. Portion68 can contain 100% Comp. with a small quantity of white pigment. Theshaving-aid composite shown in FIGS. 2 and 3 also may include only twolengthwise-extending portions.

What is claimed is:
 1. A wet shaving system comprising a blade memberand a skin-engaging portion in proximity to said blade member, saidskin-engaging portion comprising a solid polymeric shaving aid compositeincluding a first exposed lengthwise-extending portion containing afirst shaving aid, and an adjacent, second exposed lengthwise-extendingportion containing a second shaving aid, wherein said first exposedlengthwise extending portion has a different composition than saidsecond exposed lengthwise-extending portion, and wherein said secondportion is a different color than said first portion so that saidshaving aid composite has a striped appearance caused by the contrastbetween said first and second portions.
 2. The shaving system of claim1, wherein said first shaving aid and said second shaving aid are thesame.
 3. The shaving system of claim 1, wherein said first shaving aidis different from said second shaving aid.
 4. The shaving system ofclaim 3, wherein said first shaving aid is incompatible with said secondshaving aid.
 5. The shaving system of claim 1, wherein said firstshaving aid would adversely affect the structural integrity of saidsecond portion if said second portion contained the quantity of saidfirst shaving aid contained in said first portion.
 6. The shaving systemof claim 1, wherein said first portion further comprises a firstwater-insoluble polymer and said second portion further comprises asecond water-insoluble polymer.
 7. The shaving system of claim 6,wherein said first water-insoluble polymer and said secondwater-insoluble polymer independently are selected from the groupconsisting of polyethylene, polypropylene, polystyrene,butadiene-styrene copolymer, polyacetal, acrylonitrile-butadiene-styrenecopolymer, and ethylene vinyl acetate copolymer.
 8. The shaving systemof claims 1 or 7, wherein said first shaving aid comprises a lubricouswater-soluble polymer.
 9. The shaving system of claim 8, wherein saidwater-soluble polymer comprises polyethylene oxide.
 10. The shavingsystem of claim 1, wherein said first shaving aid and said secondshaving aid independently are selected from the group consisting ofpolyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropylcellulose, polyvinyl imidazoline, and polyhydroxyethylmethacrylate;beard hair softeners; oils such as silicone oil and mineral oil;substances that enhance the healing or stop the bleeding of the skin;essential oils such as menthol, eugenol, eucalyptol, safrol, and methylsalicylate; rinsing aids; non-volatile cooling agents; inclusioncomplexes of skin-soothing agents with cyclodextrin; fragrances; vitaminE; vitamin A and B-carotene; panthenol and aloe;antipruritic/counterirritant materials; antimicrobial/keratolyticmaterials; anti-inflammatory agents; and astringents.
 11. The shavingsystem of claim 6, wherein said first shaving aid is different from saidsecond shaving aid and said first portion includes, in addition to saidfirst shaving aid, a further shaving aid which is the same as saidsecond shaving aid.
 12. The shaving system of claim 11 wherein saidfurther shaving aid and said second shaving aid each comprisepolyethylene oxide.
 13. The shaving system of claim 12, wherein saidfirst shaving aid comprises vitamin E or aloe.
 14. The shaving system ofclaim 6 wherein said first shaving aid and said second shaving aid eachcomprise polyethylene oxide.
 15. The shaving system of claim 1, whereinsaid shaving aid composite further comprises a third, exposedlengthwise-extending portion, containing a third shaving aid, adjacentsaid first portion, such that said first portion is located between saidsecond and third portions.
 16. The shaving system of claims 15, whereinsaid shaving aid composite includes a connecting portion that extendsunder said first portion and connects said second portion and said thirdportion.
 17. The shaving system of claim 16, wherein said first portion,said second portion, said third portion and said connecting portion,each comprises a water insoluble polymer.
 18. The shaving system ofclaim 17 wherein said connecting portion, said second portion and saidthird portion have the same composition.
 19. The shaving system of claim17 wherein said third shaving aid and said second shaving aid are thesame.
 20. The shaving system of claim 18 wherein said first portioncontains a larger quantity of shaving aid than said second and thirdportions.
 21. The shaving system of claims 15, 16, 17, 18, 19 or 20wherein said first, second and third shaving aids each comprisepolyethylene oxide.
 22. The shaving system of claim 18 wherein saidfirst shaving aid is different from said second and third shaving aids.23. The shaving system of claim 22 wherein said first portion includes,in addition to said first shaving aid, a further shaving aid which isthe same as said second and third shaving aids.
 24. The shaving systemof claim 23 wherein said further shaving aid and said second and thirdshaving aids each comprise polyethylene oxide.
 25. The shaving system ofclaim 24, wherein said first shaving aid comprises vitamin E or aloe.26. The shaving system of claim 18, wherein said water-insoluble polymerin each portion is independently selected from the group consisting ofpolyethylene, polypropylene, polystyrene, butadiene-styrene copolymer,polyacetal, acrylonitrile-butadiene-styrene copolymer, and ethylenevinyl acetate copolymer.
 27. The shaving system of claim 16, whereinsaid first portion is adapted to gradually wear away during shaving,thereby indicating that said first shaving aid is depleted.
 28. Theshaving system of claim 16, wherein said first portion comprises about10% to about 40% by weight water-insoluble polymer and about 20% toabout 80% polyethylene oxide, and wherein said second portion and saidthird portion each comprise about 15% to about 40% water-insolublepolymer and about 20% to about 80% polyethylene oxide.
 29. A wet shavingsystem comprising a blade member and a skin-engaging portion inproximity to said blade member, said skin-engaging portion comprising asolid polymeric shaving aid composite including a first exposedlengthwise-extending portion containing a first shaving aid, and anadjacent, second exposed lengthwise-extending portion containing asecond shaving aid, wherein said first exposed lengthwise-extendingportion has a different composition than said second exposedlengthwise-extending portion, and wherein said second portion is raisedrelative to said first portion.
 30. A wet shaving system comprising ablade member and a skin-engaging portion in proximity to said blademember, said skin-engaging portion comprising a solid polymeric shavingaid composite including a first exposed lengthwise-extending portioncontaining a first shaving aid, and an adjacent, second exposedlengthwise-extending portion containing a second shaving aid, said firstportion extending under the second, wherein said first exposedlengthwise-extending portion has a different composition than saidsecond exposed lengthwise-extending portion.
 31. The shaving system ofclaim 29 or 30, wherein said first shaving aid and said second shavingaid are the same.
 32. The shaving system of claim 29 or 30, wherein saidfirst shaving aid is different from said second shaving aid.
 33. Theshaving system of claim 29 or 30, wherein said first portion furthercomprises a first water-insoluble polymer and said second portionfurther comprises a second water-insoluble polymer.
 34. The shavingsystem of claim 33, wherein said first water-insoluble polymer and saidsecond water-insoluble polymer independently are selected from the groupconsisting of polyethylene, polypropylene, polystyrene,butadiene-styrene copolymer, polyacetal, acrylonitrile-butadiene-styrenecopolymer, and ethylene vinyl acetate copolymer.
 35. The shaving systemof claim 34 wherein said first shaving aid and said second shaving aideach comprise polyethylene oxide.
 36. The shaving system of claim 35,wherein said first portion comprises about 10% to about 40% by weightwater-insoluble polymer and about 20% to about 80% polyethylene oxide,and wherein said second portion comprises about 10% to about 40%water-insoluble polymer and about 20% to about 80% polyethylene oxide.37. The shaving system of claim 36, wherein the second portion comprisesa larger weight percentage of shaving aid than the first portion. 38.The shaving system of claim 37, wherein said second portion additionallycomprises a further shaving aid.
 39. The shaving system of claim 29 or30, wherein said second portion comprises a larger weight percent ofsaid shaving aid than said first portion.
 40. The shaving system ofclaim 39, wherein the first shaving aid and the second shaving aid eachcomprise polyethylene oxide.
 41. The shaving system of claim 29 or 30,wherein said second portion is a different color than said first portionso that said shaving aid composite has a striped appearance caused bythe contrast between the first and second portion.
 42. The shavingsystem of claim 30, wherein the second portion is raised relative to thefirst portion.